21554715

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{15791}}^1$

素因数の和:15819

約数の個数: 32

約数和(自身を含む): 42448896

約数和(自身を除く): 20894181

約数列:

[1, 3, 5, 7, 13, 15, 21, 35, 39, 65, 91, 105, 195, 273, 455, 1365, 15791, 47373, 78955, 110537, 205283, 236865, 331611, 552685, 615849, 1026415, 1436981, 1658055, 3079245, 4310943, 7184905, 21554715]

約数ペア:

[(1, 21554715), (3, 7184905), (5, 4310943), (7, 3079245), (13, 1658055), (15, 1436981), (21, 1026415), (35, 615849), (39, 552685), (65, 331611), (91, 236865), (105, 205283), (195, 110537), (273, 78955), (455, 47373), (1365, 15791)]